Name Acronym Date Type* Location Association
(*G–Governmental; I–Institutional; Pr–Private; Pu–Public; S–School & U–University)
| Garnet Hill Observatory | GHOG | 1808-1826 | I | Lanarkshire | Glasgow Society for promoting Astronomical Science |
| George Abell Observatory | GAO | 1990s- | I | Buckinghamshire | Abell, George; Open University |
| Gladstone’s Observatory | GlO | 1860s-1875 | Pr | Caernarvonshire | Gladstone, Murray |
| Godlee Observatory | GO | 1903- | I | Lancashire | Manchester Astronomical Society; Manchester Municipal Institute of Technology |
| Gonville and Caius College Observatory | GCCOC | 1764 (fl.) | U | Cambridgeshire | Gonville and Caius College, Cambridge |
| Green House Farm Observatory | GHFO | 2006- | I | Norfolk | North Norfolk Astronomical Society |
| Greg Observatory | GrO | 1892-1960 | I | Lancashire | Lancaster Corporation |
| Grenville’s Observatory | GOH | 1807 (c.) | I | Pembrokeshire | Grenville, Charles Francis |
| Groombridge’s Observatory | GOB | 1806-1832 | Pr | County of London | Groombridge, Stephen |
| Guersey Observatory | See La Société Guernesiaise Observatory [LSGO] | ||||
| Haikin Observatory | see Grenville’s Observatory [GOH] | ||||
| Hall’s Cottage Observatory | HCO | 1899-1915 | Pr | Buckinghamshire | Hall, John James |
| Hampstead Observatory | HOHH | 1910- | I | County of London | The Hampstead Scientific Society (HSS); Avenell, George; Heberden, Henry |
| Hanbury’s Brockhurst Observatory | HOB | 1910-1939 | Pr | Sussex | Hanbury, Frederick J.; Franks, William; |
| Hanwell Community Observatory | HCOB | 1992- | I | Oxfordshire | Wall, John |
| Harewood Lodge Observatory | HLO | 1901-1924 | Pr | Yorkshire – West Riding | Brook, Charles Lewis |
| Hartwell House Observatory | HaHO | 1831-1860s | Pr | Buckinghamshire | Lee, John; Smyth, W.H. |
| Hatfield Observatory | See Bayfordbury Observatory [BOB] | ||||
| Hay’s Observatory | See Hay’s Norwood Observatory [HONL] | ||||
| See Hay’s Hendon Observatory [HOHL] | |||||
| Hay’s Norwood Observatory | HONL | c.1927-1934 | Pr | County of London | Hay, William Thomson |
| Hay’s Hendon Observatory | HOHL | 1935-c.1949 | Pr | County of London | Hay, William Thomson |
| Hauxley Observatory | HOHNR | 2008- | I | Northumberland | Northumberland Astronomical Society |
| Hedley Robinson’s Observatory | HRO | 1965-1992 | Pr | Devon | Robinson, Hedley |
| Hele’s School Observatory | HSO | 1964-1970 | S | Devon | Heles’s School |
| Hepple Observatory | HeO | 1910s-1950s | Pr | Northumberland | Wilfred-Hall |
| Herschel Astronomical Society Observatory | HASO | 1966 | I | Berkshire | Herschel Astronomical Society; Eton College |
| Herschel’s Bath Observatory | WHOB | 1776-1782 | Pr | Somerset | Herschel, William |
| Herschel’s Datchet Observatory | WHOD | 1783-1785 | Pr | Buckinghamshire | Herschel, William; Herschel, Caroline |
| High Legh Community Observatory | HLCO | 2014 | I | Cheshire | High Legh Community Observatory |
| High school of Stirling Observatory | HSSO | 1890- | S | Stirlingshire | Pullar; Lawrence; Peck, William Campbell-Bannerman; Henry |
| High Top Observatory | HTO | 1974- | I | Hertfordshire | South West Hertfordshire Astronomical Society |
| Highfield House Observatory | HHO | 1850s-1882 | Pr | Nottinghamshire | Lowe, Alfred |
| Holmes’s Observatory | HOHR | 1890s-1900s | Pr | County of London | Holmes, Edwin |
| Hooke’s Observatory | HOGC | 1668-1669 | Pr | County of London | Hooke, Robert; Gresham College |
| Horncastle Residential College Observatory | HRCO | 1974-2000 | U | Lincolnshire | Horncastle Residential College |
| Horselethill Observatory | HOG | 1841-1938 | I/U | Lanarkshire | Grant, Robert |
| Housman’s Observatory | HoO | 1931(fl.)-1955 | Pr | Cumberland | Housman, William Bradshaw |
| Housman’s Seaton Observatory | see Housman’s Observatory [HoO] | ||||
| Huddart’s Observatory | HOI | c.1788-1816? | Pr | County of London | Huddart, Joseph |
| Hudson’s Observatory | HOWK | 1910-1929 | Pr | Cheshire | Hudson, George Henry |
| Huddersfield Observatory | HuO | 1973- | I | Yorkshire – West Riding | Huddersfield Astronomical and Philosophical Society (HAPS) |
| Huggins’s Observatory | HOTHL | 1856-1908 | Pr | County of London | Huggins, William |
| Hunt’s Observatory | HuO | 1930s-1950s? | Pr | Nottinghamshire | Hunt, W. |
| Hurst’s Observatory | DOP | c.1974-1985 | Pr | Northamptonshire | Hurst, Guy |
| Hussey’s Observatory | HOH | 1825-1837 | Pr | Kent | Hussey, Thomas J. |
| Imperial College Observatory | ICOL | 1903-1936 | U | County of London | Imperial College of Science and Technology |
| Institute of Astronomy | IoA | 1946- | U | Cambridgeshire | University of Cambridge |
| Isle of Man Observatory | IOMO | 1996- | I | Isle of Man | Isle of Man Astronomical Society |
| Isle of Wight Observatory | IOWO | 1998- | I | Isle of Man | Vectis Astronomical Society |
| J. A. Jones Hoober Observatory | JAJHO | 1993- | I | Yorkshire – West Riding | Mexborough & Swinton Astronomical Society (MeSAS) |
| James Irwin Observatory | JIO | 1990- | I | Kent | Mid Kent Astronomical Society |
| Jenkins’s Observatory | JO | 1842-? | Pr | Glamorgan | Jenkins, John |
| Jeremiah Horrocks Observatory | JHO | 1927- | U | Lancashire | University of Central Lancashire |
| Jersey Observatory | See Sir Patrick Moore Centre | ||||
| Jim Savage-Lowden Observatory | JSLO | 2008- | I | Inverness | Highland Astronomical Society |
| Jodrell Bank Observatory | JBO | 1945- | U | Cheshire | Lovell, Bernard; University of Manchester |
| John Hippisley’s Observatory | JHOSE | c.1854-1899 | Pr | Somerset | Hippisley, John |
| Keble College Observatory | KCO | 1889-1892 | U | Oxfordshire | Lowe; Keble College, Oxford |
| Keele Observatory | KO | 1962- | U | Staffordshire | Maddison, Ron; University of Keele |
| Kenley Observatory | See Norman Fisher Observatory [NFO] | ||||
| Kew Observatory | KeOR | 1842- | I | Surrey | British Association for the Advancement of Science; De la Rue, Warren; National Physical Laboratory; Balfour, Stewart |
| Kew Observatory | 1768-1840 | see King’s Observatory (KiOR) | |||
| Kielder Observatory | KOK | 2008- | I | Northumberland | Kielder Observatory Astronomical Society |
| King’s Observatory | KiOR | 1768-1840 | Pr | Surrey | King George III; Demainbrays; Peter Rigaud |
| King’s College Observatory | see Cromwell Tower Observatory [CTOA] | ||||
| Kingston High School Observatory | KHSO | 1953-1982 | S/I | Yorkshire: East Riding | Walker, William Cameron; Kingston High School |
| Knight’s Observatory | KOW | c.1890-c.1906 | Pr | Hampshire | Knight, Henry Sollers |
| Knot’s Woodcroft Observatory | KWO | 1859-1873 | Pr | Sussex | Knott, George |
| Knott’s Lodge Observatory | KLO | 1875-1893 | Pr | Sussex | Knott, George |
| Ladies College, Darlington Observatory | LCOD | 1887-c.1909 | S | Durham | Dixon, C.A. |
| Lancaster Observatory | see Greg Observatory [GrO] | ||||
| Larkin’s Observatory | LOB | c.1790s-1800 | Pr | County of London | Larkins, William |
| La Société Guernesiaise Observatory | LSGO | 1993- | I | Channel Islands | La Société Guernesiaise |
| Lassell’s Starfield Observatory | LSO | 1840-1861 | Pr | Lancashire | Lassell, William |
| Lattey’s Observatory | LO | 1890s | Pr | Glamorgan | Lattey, Norman |
| Lawson Beeston Observatory | LON | 1851-1866 | Pr | Nottinghamshire | Lowe, Edward J. |
| Lawson’s Bath Observatory | LBO | 1841-1855 | Pr | Somerset | Lawson, Henry |
| Leighton Observatory | LeO | 1994- | I | Lancashire | Liverpool Astronomical Society (LAS) |
| Letchworth Observatory | LOL | 1996- | I | Hertfordshire | Letchworth and District Astronomical Society |
| Levin’s Observatory | LOS | 1928-1939 | Pr | Sussex | Levin, A.E. |
| Lilburn Observatory | LiO | 1852- | Pr | Northumberland | Collingwood, Edward John |
| Lime Tree Observatory | LTO | 2016- | Pu/Pr | Yorkshire: North Riding | Wall, John; Foster, Peter |
| Lincoln Castle Observatory Tower | LCOT | 1825-? | Pr | Lincolnshire | Merryweather, John; Lincoln Castle |
| Lindemann’s Observatory | LOSHS | 1884-1927 | Pr | Devon | Lindemann, A.F. |
| Liverpool Astronomical Society Observatory | LASOL | c.1900-2000s | I | Lancashire | Liverpool Astronomical Society |
| Liverpool City Observatory | LCO | 1844-1866 | I | Lancashire | Hartnup, J.C.; Mersey Dock & Harbour Board |
| Liverpool Observatory | 1866-1960s | see Bidston Observatory [BiO] | |||
| 1844-1866 | see Liverpool City Observatory [LCO] | ||||
| Liverpool Observatory and Tidal Institute | 1866-1960s | see Bidston Observatory [BiO] | |||
| Llewellyn’s Observatory | LlO | 1851 (c.). | Pr | Glamorgan | Llewellyn, John Dillwyn |
| Lockyer’s Hampstead Observatory | LOHH | 1865-1873 | Pr | County of London | Lockyer, Norman |
| Lockyer’s Wimbledon Observatory | LOWH | 1862-1865 | Pr | Surrey | Lockyer, Norman |
| Loughton Hall Observatory | LHO | 1969-2005 | I | Essex | Loughton Astronomical Society |
| Low Dalby Astronomy Centre | LDAC | 2001- | I | Yorkshire: North Riding | Scarborough and Ryedale Astronomical Society (SRAS); Forestry Commission |
| Lowe’s Observatory | LoOB | 1850s-1866 | Pr | Nottinghamshire | Lowe, Alfred |
| Lowndes’s Observatory | LOHS | 1851-? | Pr | Buckinghamshire | Lowndes, Charles |
| Loxham Observatory | LOCU | c.2015- | U/I | Bedfordshire | Cranfield University |
| Ludham’s Observatory | see Cockfield Tower Observatory [CTO] | ||||
| Luton Astronomical Society Observatory | LASO | 1992 | I | Bedfordshire | Dall, Horace |